Original scientific paper
CHANGES IN RANGE OF PERFORMANCE TEST RESULTS OF GILTS OF POLISH LARGE WHITE BREED PRODUCED IN POLAND IN BYDGOSZCZ BREEDING REGION
GRAŻYNA MICHALSKA
; University of Technology and Life Sciences, Faculty of Animal Breeding and Biology, Department of Animal Product Evaluation, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland
JERZY NOWACHOWICZ
; University of Technology and Life Sciences, Faculty of Animal Breeding and Biology, Department of Animal Product Evaluation, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland
TOMASZ BUCEK
; University of Technology and Life Sciences, Faculty of Animal Breeding and Biology, Department of Animal Product Evaluation, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland
PRZEMYSŁAW DARIUSZ WASILEWSKI
; University of Technology and Life Sciences, Faculty of Animal Breeding and Biology, Department of Animal Product Evaluation, ul. Ks. Kordeckiego 20, 85-225 Bydgoszcz, Poland
Abstract
The aim of the paper was analysis of changes in range of performance test results of 19782 gilts of Polish Large White
conducted in years 1995-2004, produced in Poland in the area activity of Bydgoszcz Breeding Region, covering Kujawy-Pomorze Province. Animals were evaluated regarding to the same obligatory methodology in years 1995- 2004. Within the space of 10 analyzed years 1995-2004 fat content decreased, i.e. backfat thickness in P2 and P4 points decreased by 4.1 and 3.3 mm, respectively. Body meat content of tested pigs increased by 4 % and performance test
selection index increased by 14.2 points. Systematic increase in analyzed years performance test selection index value of gilts (from 110.7 points in 1995 up to 124.9 points in 2004) in Bydgoszcz Breeding Region shows effective improvement of pigs of Polish Large White breed in this area of Poland.
Keywords
Polish Large White; gilts; performance test
Hrčak ID:
35410
URI
Publication date:
28.11.2008.
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